Cycles: merge of cycles-x branch, a major update to the renderer

This includes much improved GPU rendering performance, viewport interactivity,
new shadow catcher, revamped sampling settings, subsurface scattering anisotropy,
new GPU volume sampling, improved PMJ sampling pattern, and more.

Some features have also been removed or changed, breaking backwards compatibility.
Including the removal of the OpenCL backend, for which alternatives are under
development.

Release notes and code docs:
https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Cycles
https://wiki.blender.org/wiki/Source/Render/Cycles

Credits:
* Sergey Sharybin
* Brecht Van Lommel
* Patrick Mours (OptiX backend)
* Christophe Hery (subsurface scattering anisotropy)
* William Leeson (PMJ sampling pattern)
* Alaska (various fixes and tweaks)
* Thomas Dinges (various fixes)

For the full commit history, see the cycles-x branch. This squashes together
all the changes since intermediate changes would often fail building or tests.

Ref T87839, T87837, T87836
Fixes T90734, T89353, T80267, T80267, T77185, T69800

1 files changed, 21 insertions, 34 deletions

diff --git a/intern/cycles/render/film.h b/intern/cycles/render/film.h
index 462a7275491..5d327353361 100644
--- a/intern/cycles/render/film.h
+++ b/intern/cycles/render/film.h
@@ -17,6 +17,7 @@
 #ifndef __FILM_H__
 #define __FILM_H__
 
+#include "render/pass.h"
 #include "util/util_string.h"
 #include "util/util_vector.h"
 
@@ -38,36 +39,15 @@ typedef enum FilterType {
   FILTER_NUM_TYPES,
 } FilterType;
 
-class Pass : public Node {
- public:
-  NODE_DECLARE
-
-  Pass();
-
-  PassType type;
-  int components;
-  bool filter;
-  bool exposure;
-  PassType divide_type;
-  ustring name;
-
-  static void add(PassType type, vector<Pass> &passes, const char *name = NULL);
-  static bool equals(const vector<Pass> &A, const vector<Pass> &B);
-  static bool contains(const vector<Pass> &passes, PassType);
-};
-
 class Film : public Node {
  public:
   NODE_DECLARE
 
   NODE_SOCKET_API(float, exposure)
-  NODE_SOCKET_API(bool, denoising_data_pass)
-  NODE_SOCKET_API(bool, denoising_clean_pass)
-  NODE_SOCKET_API(bool, denoising_prefiltered_pass)
-  NODE_SOCKET_API(int, denoising_flags)
   NODE_SOCKET_API(float, pass_alpha_threshold)
 
   NODE_SOCKET_API(PassType, display_pass)
+  NODE_SOCKET_API(bool, show_active_pixels)
 
   NODE_SOCKET_API(FilterType, filter_type)
   NODE_SOCKET_API(float, filter_width)
@@ -76,17 +56,18 @@ class Film : public Node {
   NODE_SOCKET_API(float, mist_depth)
   NODE_SOCKET_API(float, mist_falloff)
 
-  NODE_SOCKET_API(bool, use_light_visibility)
   NODE_SOCKET_API(CryptomatteType, cryptomatte_passes)
   NODE_SOCKET_API(int, cryptomatte_depth)
 
-  NODE_SOCKET_API(bool, use_adaptive_sampling)
+  /* Approximate shadow catcher pass into its matte pass, so that both artificial objects and
+   * shadows can be alpha-overed onto a backdrop. */
+  NODE_SOCKET_API(bool, use_approximate_shadow_catcher)
 
  private:
-  int pass_stride;
-  int denoising_data_offset;
-  int denoising_clean_offset;
-  size_t filter_table_offset;
+  size_t filter_table_offset_;
+  bool prev_have_uv_pass = false;
+  bool prev_have_motion_pass = false;
+  bool prev_have_ao_pass = false;
 
  public:
   Film();
@@ -98,14 +79,20 @@ class Film : public Node {
   void device_update(Device *device, DeviceScene *dscene, Scene *scene);
   void device_free(Device *device, DeviceScene *dscene, Scene *scene);
 
-  void tag_passes_update(Scene *scene, const vector<Pass> &passes_, bool update_passes = true);
-
   int get_aov_offset(Scene *scene, string name, bool &is_color);
 
-  int get_pass_stride() const;
-  int get_denoising_data_offset() const;
-  int get_denoising_clean_offset() const;
-  size_t get_filter_table_offset() const;
+  /* Update passes so that they contain all passes required for the configured functionality.
+   *
+   * If `add_sample_count_pass` is true then the SAMPLE_COUNT pass is ensured to be added. */
+  void update_passes(Scene *scene, bool add_sample_count_pass);
+
+  uint get_kernel_features(const Scene *scene) const;
+
+ private:
+  void add_auto_pass(Scene *scene, PassType type, const char *name = nullptr);
+  void add_auto_pass(Scene *scene, PassType type, PassMode mode, const char *name = nullptr);
+  void remove_auto_passes(Scene *scene);
+  void finalize_passes(Scene *scene, const bool use_denoise);
 };
 
 CCL_NAMESPACE_END